Most of New York is cheaper than Mumbai or even South Delhi

For eg this house in Brooklyn, NYC is cheaper than an apartment in Dadar. At 20k ₹ per sqft, it's cheaper than even new Kharghar sector 35 flats.
That's not counting the fact that it's freehold land with a built house, not one of 100 flats.

Billionaires, builders, investors both domestic and foreigners and politicians have created artificial land scarcity in India by focusing every development in a few metro cities.